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Though passion may have strained, it must not break our bonds of affection.
VOA: special.2009.02.09
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There's not actually chemical covalent bonds that are formed but it's a non-covalent interaction, usually dominated by hydrogen bonding.
所以配体和受体之间不生成共价键,这是一种非共价化合反应,它们通常以氢键相联
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But, of course, what you saw in recitation, and hopefully, what you can now think very quickly by looking at this, is that this is not the only configuration of pi bonds that we could have in benzene.
当然，你们在习题课看到过，你们通过看这个可以很快的想到，这不是苯环里,唯一的π键构型。
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we tried to anticipate what companies might not be able to file and buy their bonds in advance.
我们试图去预测,什么样的公司可能没有能力发布,然后提前购买它们的债券。
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On the one hand it's clearly good that humans rise above the animals and build cities and wear clothes and pursue the arts of civilization and develop bonds of love and duty and friendship the way that animals do not; these are the things that make humans like the gods in The Epic of Gilgamesh.
一方面，成为人类也未尝不是一件好事,人类优于动物，穿着衣服，用自己的双手建造城市,打造文明的生活方式，而爱和责任,把人类联结起来，这些是动物无法比拟的,在《吉尔伽美什史诗》中，这些特质让人类具有神性。
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All right, so we can now see a little bit of what the power of molecular orbital theory is in predicting what kind of bonds we're going to see in molecules, or whether or not we'll see this bonding occur at all.
好了，我们已经可以看到一点,分子轨道理论在预测分子中,所成的键或者分子，能不能成键方面的能力了。
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So as we said when we first introduced covalent bonds, it's a sharing of electrons, but it's not always an equal sharing.
当我们刚开始介绍共价键的时候，我们说过电子是被共用的，但是共用却不一定是均等的。
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The costs were huge -not just the immediate costs in terms of the move from stocks to bonds.
代价是巨大的,不仅仅是卖掉股票,和买进债券的直接交易成本
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Oil, bonds, and stocks are all independent-- somewhat independent--they're not perfectly independent, but they're somewhat independent and, to the extent that they are, it lowers the variance.
石油，债券和股票都是互相独立-,一定程度上独立，不是绝对的独立，但一定程度上独立，可以使方差值变小，降低风险。
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When the Treasury in the United States sells Treasury bills notes and bonds they deal almost exclusively or we say primarily--with broker-dealers not the general public.
当美国的财政部,卖出国库券，票据，债券时,他们几乎是私下交易的,或者说首先与经纪自营商交易,而不是大众市场。
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We have two lone pairs, so if we thought about what the bonds were everywhere, 5° it would be 109 . 5, but it's bent because we're only looking at the bonds, we're not counting the Lewis structures in naming our geometry, but they do affect the angles.
我们有两个孤对，所以如果我们考虑它会成怎样的键时，应该成109。,但它是折线型，因为我们只考虑成键，在几何形状里不考虑Lewis结构，但它会影响角度。
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There's not two bonds, that's one pi bond, and the reason is because it's 2 p orbitals coming together, and remember p orbitals have electron density above and below the axis, so when they come together, it kind of looks like one bonds, but essentially what we have here is one pi bond.
这不是两个键，这是一个π键，因为这是两个2p轨道组合而成的，记住p轨道在键轴之上,和键轴之下都有电子密度，当它们靠近时，这看着很像两个键，但本质上它是一个π键。
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We were interested in finding bonds trading below par where we thought there was a chance that companies would not file their financial statements on time.
我们对发现以低于票面价值进行交易的债券很感兴趣,我们认为在没有按时发布它们财务报表的公司,时机有可能发现。
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Now, the problem is that if you invest in bonds from some state or local government, they might not pay you back; they can just go bankrupt.
现在的问题是如果你投资了,州或者地方政府发行的债券,他们可能无法支付,他们可能会破产
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